The Asylum has a wonderful interview with Geoff Dyer here, if you missed it the first time around.
[Updated courtesy of John Self (see comments)] Jim Crace, incidentally in the queue here at Hungry Like the Woolf, has not interviewed Geoff Dyer. A completely separate and unrelated Crace has conducted, however, a very good interview of Dyer in the Guardian. Paris Trance is not the topic, but the second Crace does dribble out some interesting bits about the sex scenes.
Dyer gives a little insight into Luke and Paris Trance while being interviewed by Jed Lipinski for The Brooklyn Rail.
The Paris Review does have available for free its interview of Graham Greene. It is, as almost all their interviews are, outstanding.